100% completely new to this but was hoping to be able to do a segment swap for 4l80. I just installed the 4l80 and was hoping to be able to swap a stock file until I could get the truck to the tuner to have him make some tweaks. I've read that I need to do a segment swap using a tune with the same OS but have searched and searched and downloaded numerous files. I'm having no luck finding a file in the tune repository w an OS 2020005 match. Someone please point me in the right direction. Truck is a 2002 Sierra w a 6.0 swap and have everything to install lsa supercharger but was getting the 4l80 and other supporting mods squared away first.